If a equals "true" (Boolean value), the function returns b. Subsequent functions in a function chain on this target field are executed.

If a is not "true", no value is assigned to the target field on which the function is located and the Empty Flag is set. Subsequent functions in a function chain on this target field are not executed.

Important note: This function can only be used on fields within a node with value "Loop" in attribute "Iteration".